Riveting tool



Oct. 12, 1948. M, BROWN 2,451,063

RIVETING TOOL Filed June 2, 1944 Z l l @5i f f k Patented Oct. 12, 1948 UNITED STATES PATENT OFFICE RIVETING TOOL Morris Brown, San Diego, Calif.

Application June 2, 1944, Serial No. 538,356 (c1. '1s-53.5)

10 Claims. 1

The invention relates to bucking tools for riveting.

One object of the invention is to provide an improved manually manipulated bucking tool of the type in which the bucking element which engages the rivets has imparted thereto by a springpressed anvil counter blows reactively to the blows imparted to the element through the rivets by the hammer and by which the magnitude of the counter blows and the action of the bucking tool may be varied to proportion the loads on the operators of the bucking tool and the hammer for riveting under diierent conditions and also for different kinds of work.

Another object of the invention is to provide a hand-manipulated bucking tool with means for damping the vibration of the bucking element to expedite the upsetting of the rivets by counter blows reactively to the blows from the hammer.

Another object of the invention is to provide a bucking tool which is simple in construction and provided with interchangeable bucking elements for diierent kinds of work.

Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features hereinafter set forth and more particularly dened by claims at the conclusion hereof.

In the drawings:

Fig. l is a side elevation of a tool embodying the invention, parts being shown in section.

Fig. 2 is a section taken on line 2-2 of Fig. 1.

Fig. 3 is an end elevation.

Fig. 4 is a view illustrating the bucking tool and the power-operated hammer associated with the work.

Fig. 5 is a side elevation, parts shown in section, with a dierentform of element for bucking heavy rivets.

Fig. 6 is a face view of the bucking element shown in Fig. 5

The bucking tool comprises an elongated body 8 which terminates at one end in a handle or grip 9; a bucking element I0 which is provided with an elongated face Ia adapted to be engaged by a series of rivets a in the work c and to receive blows through the rivets from a poweroperated hammer b; a plate-like member I3 welded or otherwise secured on the element and fitting against one side-face of the body for holding the body and element against relative rotation; a pair of anvils I symmetrically disposed on the opposite sides of stem II, engaging an inner face 26 on the element I0 adjacent its ends, respectively, each of which is xedly secured to a stem I6 which is slidable in a socket IB in the body 8; coil springs I1 around the stems I6, respectively, for operating the anvils I5 to impart counter blows to the element I0, each spring being confined in a socket 20, and coiled around a stem I6 and interposed between an anvil I5 and a shoulder I9 at the inner end of socket 20; a pair of springs 30 for damping the vibrations of the element I0 and disposed between the stem II and the anvils"'I5 and having their ends held in sockets 3l in body 8 and sockets 32 in the element I0; a nut 22 screw-threaded to the inner end of stem II and adapted to be adjusted on said stem to limit the movement of the element I0 away from the body and to vary the normal compression of the springs 30; and a lock-nut 23 and lock-washer 24 for securing the nut 22 in its assigned position on the stem I I. The springs 30 are adapted to press the bucking element against the nuts independently of the anvils, and restrain the element from following the anvils I5 reactively to the hammer blows so that the anvils will impart the full force of their spring imparted blows to the bucking bar in opposition to the hammer blows, and function as damping devices for the vibrations of the bucking element.

The operation of the bucking tool is as follows: The rivets a are inserted through the work and the operator of the tool holds the body 8 so that the face Illa of the element I0 will engage the inner end of the group of rivets and hold the element against the rivet while the power-operated hammer c, manipulated by another operator, imparts hammer blows to the preformed head on the rivets. Blows from the hammer will be imparted through the rivet to the spring-pressed element IIJ for coacting with the hammer in upsetting the inner end of the rivets. These blows will be transmitted by the element I0 to the anvils I5, causing the latter to rebound from the element against the force of springs I'l. These springs operate the anvils I5 to impart counter blows to the bucking element I0. The springs 30 press the element I0 away from the body and toward the rivets independently of the springpressed anvils I5 and damp the vibrations of the bucking element I0 to cause the anvils and springs to impartvmore effective counter blows to the element I0 than when the element is free to vibrate or follow the movements of the anvils. This results in accelerating the upsetting of the heads on the rivets and eiects a saving of time in riveting operations.

By providing a single bucking element I0 which is adapted to simultaneously engage a series or group of rivets, the bucking tool can be held in one position by its operator While the entire group or series of rivets are being successively operated' the bucking element yfor upsetting rivets of different thickness or sizes or for coaction with hammers of different powers.

By adjusting the bucking tool for coacting with a power-operated Y bucking tool and Vfor the hammer may be propornut 22 on the stem I-l of the bucking element IU,

the force of springs 3l! can be varied. .For example, if the element I!) is adjusted to increase its distance from the body, the` compressionof springs and their` damping eiect Will be decreased and the compression of springs 2U willY be decreased to decrease their compression and theL resistance to` the hammer blows on saidV clef menitwill be decreased. When the 'element HI is thus adjusted. the bucking toollwill be freer' to f move responsively to the hammer blows with the v result that the reactive counter blows of the anvils l5 will be ofi less force` oreitect and the load upon the bucking tool operatorrwill be decreased.

When the nut 22 is adjusted.v to move theelement ill .towardf the body, thek compressionof p springs 2Qv and 3l?Y will be increased with the result that Ythe bucking element will oder greater resistance to the hammer blows and` will receive more powerful counter blows so that the bucking tool'- voperator receives a greater load and the bucking tool eiects a greater proportion of the` upsetting of the rivets. By means of thisad`r-` justmentrthe loads upon theroperators for the hammer and: thebucking tool may be proporweights. vsingle bucking elementguidedin a single body Y 4 o ner previously described, and a plurality of damping springs Vand anvils coact with the single bucking element. n

The invention provides a simple andY efficient hammer by which a group or series of rivets may be bucked while the tool is held in a singlerposition. It also exemplies a bucking tool by which the loads imposed upon the operatorsl for the tioned as desired and for'varyingVV the action of v.thebucking element for rivets of different sizes or It also exemplifiesV a tool inrwhich a providedpiwith a handle is acted upon by Va plurality'of spring-'pressed anvils. It also exemplies a bucking tool which is provided with a plurality of devices for clamping vibrations of a bucking element which is carried by a portable body.

The invention is not to be understood as restrictedfto the Vdetails, set forth, since these'may be modified within the scope of the appended claims@ without departingwfrom the spiritfand` scope of the. invention.'

Patent is;

1. A bucking Itool. for ooactingfiwithV a power Q lriammerV comprising.' a portable. bodyr a buckingY goelement provided with ay face for engaginga spring-pressed anvils provided. with stems slida- Y bly mounted in; the body' at the sides of lthe'stemfY onthe: element, springs in the body and aroundll tioned` asdesired, andY theaction of the bucking Y tool can be varied Vforrivets of -diierent weights 40-ceivedthrough the rivets from the hammer',ja plurality of resilientA devices between the element andy hammers of correspondinglygreater p'ower.'

The mass in the element l0 and in theY anvils v and-the spring-pressureA applied tothe? element Y IEB` are cao-related tov tend tosynchronize the hammer blows/andthe counter blows.V This co-relation has been found'to bev readily determinable' by trial andA providing anvils of'suitablel Weight or masses-and anvil operating springs andrd'ampving. springs oi suitablev magnitude -forthissyn-Y- chronization; --,-Adjustment of the nut 22 permits the :forcel ofnsprings- 30 toY be varied for thisY afxedltoitsouter end or integrally formed therel witha cylindrical stud Iller for engaging a rivet.V

This element isrused more particularly for buck- 1 ingv exceptionally heavyrivets and is fixed to a y Y stem Ha whichis slidably mountedin the bodyI The anvils 15, the stems |6, the anvil-oper ating Ysprings Il, damping-springs 301disposed-in f sockets 3l and 32, .and the nut 22.- for adjusting Y the force of springs til, are rof the same construction and correlated to the element lb in the sameY Y manner described in connection with threeform of .Y

the invention shown in Figs. l to 4. Stem-l lvfor extends into a slot 35 for'preventin'g relative ro-V tationof the element 'Hlb and the body Sain lieu Y ofthe plate-like extensionY i3'. It is understood l "70 ielementlprovided with?aface'forengaginga rivet and receivingimpact f blowsiffrom thev hammer that the pin and slot combination'could also be provided -in the first-'embodiment for preventing rotation-. 'Inf thisform of the invention the op-v eration of theV bucking elementV lbfis variable *byv the adjustmentlofthr'nut 1722 to varyv the@V *normali compression offsprings 30. in the man plurality ofrivets and receiving impact blows'- from the hammer through the rivets, a`ste1ncenr--A trally disposed.` on and. secured. to the element.`

and slidably mounted in ther body;A a plurality of the stem on the anvils; fory imparting tothe elc-y ment counter blows reactively to thelfblowsfzie-- and the.Y body,1 for dampingv the vibration of 'the element, disposed between the stem, onvthe ele-f. ment and. the anvilsgand means on, the stem. on f `ftheV element for adjusting th'ef normal comprese sion orv theVV resilient devices and. the range of f movement` of the element relatively tothe bodyir 2. A bucking tool `'for coacting'` with a power hammer comprising; a portable bodyr a buckingY Y y element' provided with a face forengagin'g a rivet and'receiving impact Yblows'from YtheV lriarnmcfrk through the rvetspa stemVY centrally vdisposed: on and secured to the element andslidably'mounted Vinthe;V body, a/Vpinvmeans carriedlby said stem Y and movable ina Vslot inIk said portable loclj'ftdY prevent rotation fofY said stem, a 'pluralityfoff spring-pressed anvil'sprovidedfwith-stems slidably mounted in the -body at thesidesfofi the stem on v the element, springs in the bodyand around-the GQ-stemson the' amfiis for imparting toftiieeie`Y ment counter blows reactively to theblows re ceived throughjth'e rivets; from the hammeL and Va plurality*v of *resilient devices between/theele-V Y 6 ment and theV body, for danfiping'theY vibration 'Y 5v f the element, dis osedbetweentthe stem on Vthe" element H31 is provided with a cross-pin 34 which v. o p i .o

element and the anviis.

3. A buckingftol for co-ac'tingfwith a power-'- through therivet and with a stem mounted for l? rectilinearV sliding movement in said body',V a-

plurality ofv 'anvilv members,k each provided*v with p' 755afrstemrrectilinearly"slidableinl the bodyrith'Y Having thus describedthe invention,Y what Ilv claiml asnew and desire to secure by Lettersv stems of the anvil members being disposed at opposite sides of the stem of the bucking element, a plurality of spring-means in the body, acting on the anvil members respectively,- for imparting to the bucking element counter-blows reactive to the blows received throu-gh the rivets from the hammer', and means between the bucking element stem and the body for adjusting the normal compression ol the springs acting on the anvil members.

4. A bucking tool for co-actingwith a power hammer, comprising: a portable body, means for providing a hand-hold on saidbody, a bucking element provided with a :tace for engaging a rivet and receiving impact blows from the hammer through the rivet and with a stem mounted for rectilinear sliding movement in said body, a plurality of anvil members, each provided with a stem rectilinearly slidable in the body, the stems of the anvil members being disposed at opposite sides of and parallel with the stem of the bucking element, a plurality of spring means in the body, acting on the anvil members respectively, for imparting to the bucking element counter-blows reactive to the blows received through the rivets from the hammer, and means between the bucking element stem and the body for adjusting the normal compression of the springs acting on the anvil members.

5. A bucking tool for co-acting with a power hammer, comprising: a portable body, means for providing a hand-hold on said body, a bucking element provided with a face for engaging a rivet and receiving impact blows from the hammer through the rivet and with a stem extending longitudinally through, and mounted for rectilinear sliding movement in, said body, a plurality of anvil members, each'provided with a stem rectilinearly slidable in the body, the stems of the anvil members lbeing disposed at opposite sides of and parallel to the stem of the bucking element, a plurality of spring-means in the body acting on the anvil members respectively, for imparting to the bucking element counter-blows reactive to the blows received through the rivets from the hammer, and means between the inner end of the bucking element stem and the body for adjusting the normal compression of the springmeans acting on the anvil members.

6. A bucking tool for co-acting with a power hammer, comprising: a portable body, means for providing a hand-hold on said body, a bucking element provided with a face for engaging a rivet and receiving impact blows from the hammer through the rivet and with .a stem extending longitudinally through, and mounted for rectilinear sliding movement in, said body, a plurality of anvil members, each provided with a stem rectilinearly slidable in the body, the stems of the anvil members being disposed at opposite sides of and parallel to the stem of the bucking element, a plurality of spring-means in the body lacting on the anvil members respectively, for imparting to the bucking element counter-blows reactive to the blows received through the rivets from the hammer, and screw-means between the bucking element stem and the body, for adjusting the normal compression of the springmeans acting on the anvil members.

7. A bucking tool for co-acting with a power hammer, comprising: a portable body, means for providing a hand-hold on said body, a bucking element provided with a face for engaging a rivet and receiving impact blows from the hammer through the rivet and with a stem extending longitudinally through, and mounted for recti-t linear sliding movement, and having its inner end extended outside of said body, a plurality of anvil members each provided with a stem rectilinearly Y slidable in the body, the stems of the anvil members being disposed `at opposite sides of and parallel to the stem of the bucking element, a plurality of spring-means in the body acting on the anvil members respectively, for imparting to the bucking element counter-blows reactive to the blows received through the rivets from the hammer, and means lbetween the end of the bucking element stem outside of the body and the body, for adjusting the normal compression of the springs acting on the anvil members.

8. A bucking tool for co-acting with a power hammer, comprising: a portable body, means for providing a hand-hold on said body, a bucking element provided with a face for engaging a rivet and receiving impact blows from the hammer through the rivet and with a stem extending longitudinally through, and mounted for rectilinear sliding movement in, said body, a plurality of anvil members, each provided with a stem rectilinearly slidable in the body, the stems of the anvil members being disposed at opposite sides of and parallel to the stem of the bucking element, a plurality of spring-means in the body acting on the anvil members respectively, for imparting to the bucking element counter-blows reactive to the blows received through the rivets from the hammer, a plurality of springs at the sides of the stem of the element and between the element and the body, for damping the vibrations of the bucking element, and means between one end of the bucking element stem and the body for adjusting the normal compression of the spring-means acting on the anvil members, and the damping-springs.

9. A bucking tool for co-acting with -a power hammer, comprising: a portable body, means for providing a hand-hold on said body, a bucking element provided with a face for engaging a rivet and receiving impact blows from the hammer through the rivet and with a stem mounted for rectilinearly sliding movement in said body, a plurality of anvil members each p-rovided with a stem rectilinearly slidable in the body, the stems of the anvil members being disposed at the opposite sides of the stem of the bucking element, spring-means in the body, acting on the anvil members for imparting to the bucking element counter-blows reactive to the blows received through the rivets from the hammer, a plurality of springs for damping the vibrations of the bucking element, the body and elements having confronting recesses at the sides of the buckingelement stern, for retaining said springs, and means for adjusting the normal compression of the spring-means acting on the anvil members.

10. A Ibucking tool for co-acting with a power hammer, comprising: a portable, substantially flat-sided body having an extension providing a hand-hold on said body, a bucking element provided with a face for engaging a rivet and receiving impact blows from the hammer through the rivet and with a, stem mounted for rectilinearly sliding movement in, said body; a, plurality of anvil members, each provided with a stem rectilinearly slidable in the body, the stems of the anvil members being disposed at the opposite sides of the stem of the bucking element, a plurality of spring-means in the body, acting on'the anvil members for imparting t0 the bucking ele- 7'V s; mnf, counter-blows reactive tothe blows'received i. j k A v through the rivets from the hammer, a plate on UNITED STATES. PATENTS; the element tting one sid of the body, and means Number Name Date for normally adjusting the normal compression 850,651 JOharlIlSen'f--u---nfApl- 16, V1907 of the spring-means acting on the anvil mem- 5V 1,139,504 Dorman May 18,1915L bers;` 1,222,663 Penney ,Apr, 17, V1917 MORRIS BROWN.V Vllc/garigr Aug-20,1918,

nson f; Dec. 17, 1918 REFERENCES CITED v 1,561,155` Go1dstein- Nov, 10,1925 The Vfollowing references are of record inthe v10- 1,361,691 Gabel 1- June '1,1932

le of 6111's patent: n 2,349,341 Disse f .-May 23, 1944 

